A Predator 670 engine costs $950 on its own, and the builder didn't stop there as he added Holley Sniper EFI, a turbo, billet ...

This 670cc V-twin is ready to rev and make some boost, complete with billet internals, an upgraded cam, and more.

Harbor Freight sells two versions of its Predator 212 engine with differing horsepower outputs. Both are four-stroke designs featuring horizontal crankshafts, recoil pull-start, and 212cc ...

Swapping out an engine is a complicated, and often expensive, affair. There are hoses, clips, fluids, pumps, and bolts that all need to be removed before one can even think about pulling the engine ...